GetHashCode() & Equals() position implementation

The following classes can have these overrides implemented:

Vector3
TaxiNode

A correct implementation would look like this:

        public override int GetHashCode()
        {
            return (Position.X.GetHashCode() * 397 ^ Position.Y.GetHashCode()) * 397 ^ Position.Z.GetHashCode();
        }

        public override bool Equals(object obj)
        {
            Node rhs = obj as Node;
            if (rhs == null)
                return false;
            return Position.X == rhs.Position.X
                && Position.Y == rhs.Position.Y
                && Position.Z == rhs.Position.Z;
        }

This will enable the usage of the class in Dictionary<> and HashSet<>.

These collections provide higher performance and uniqueness of each inserted element.

List<> collection's behavior will stay the same.